// @preval
const postcss = require('postcss')
const tailwindcss = require('tailwindcss')
const autoprefixer = require('autoprefixer')
const cssnano = require('cssnano')
const { loopWhile } = require('deasync')
const colors = require('tailwindcss/colors')

module.exports = () => {
  const html = `<!--
  Welcome to Tailwind Play, the official Tailwind CSS playground!

  Everything here works just like it does when you're running Tailwind locally
  with a real build pipeline. You can customize your config file, use features
  like \`@apply\`, or even add third-party plugins.

  Feel free to play with this example if you're just learning, or trash it and
  start from scratch if you know enough to be dangerous. Have fun!
-->
<div class="min-h-screen bg-gray-100 py-6 flex flex-col justify-center sm:py-12">
  <div class="relative py-3 sm:max-w-xl sm:mx-auto">
    <div class="absolute inset-0 bg-gradient-to-r from-cyan-400 to-light-blue-500 shadow-lg transform -skew-y-6 sm:skew-y-0 sm:-rotate-6 sm:rounded-3xl"></div>
    <div class="relative px-4 py-10 bg-white shadow-lg sm:rounded-3xl sm:p-20">
      <div class="max-w-md mx-auto">
        <div>
          <img src="/img/logo.svg" class="h-7 sm:h-8" />
        </div>
        <div class="divide-y divide-gray-200">
          <div class="py-8 text-base leading-6 space-y-4 text-gray-700 sm:text-lg sm:leading-7">
            <p>An advanced online playground for Tailwind CSS, including support for things like:</p>
            <ul class="list-disc space-y-2">
              <li class="flex items-start">
                <span class="h-6 flex items-center sm:h-7">
                  <svg class="flex-shrink-0 h-5 w-5 text-cyan-500" viewBox="0 0 20 20" fill="currentColor">
                    <path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z" clip-rule="evenodd" />
                  </svg>
                </span>
                <p class="ml-2">
                  Customizing your
                  <code class="text-sm font-bold text-gray-900">tailwind.config.js</code> file
                </p>
              </li>
              <li class="flex items-start">
                <span class="h-6 flex items-center sm:h-7">
                  <svg class="flex-shrink-0 h-5 w-5 text-cyan-500" viewBox="0 0 20 20" fill="currentColor">
                    <path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z" clip-rule="evenodd" />
                  </svg>
                </span>
                <p class="ml-2">
                  Extracting classes with
                  <code class="text-sm font-bold text-gray-900">@apply</code>
                </p>
              </li>
              <li class="flex items-start">
                <span class="h-6 flex items-center sm:h-7">
                  <svg class="flex-shrink-0 h-5 w-5 text-cyan-500" viewBox="0 0 20 20" fill="currentColor">
                    <path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z" clip-rule="evenodd" />
                  </svg>
                </span>
                <p class="ml-2">Code completion with instant preview</p>
              </li>
            </ul>
            <p>Perfect for learning how the framework works, prototyping a new idea, or creating a demo to share online.</p>
          </div>
          <div class="pt-6 text-base leading-6 font-bold sm:text-lg sm:leading-7">
            <p>Want to dig deeper into Tailwind?</p>
            <p>
              <a href="https://tailwindcss.com/docs" class="text-cyan-600 hover:text-cyan-700"> Read the docs &rarr; </a>
            </p>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>\n`
  const css = '@tailwind base;\n@tailwind components;\n@tailwind utilities;\n'
  const config = `const colors = require('tailwindcss/colors')

module.exports = {
  theme: {
    extend: {
      colors: {
        'light-blue': colors.lightBlue,
        cyan: colors.cyan,
      },
    },
  },
  variants: {},
  plugins: [],
}\n`

  let compiledCss

  postcss([
    tailwindcss({
      purge: {
        enabled: true,
        content: [{ raw: html }],
        options: { keyframes: true, safelist: ['html', 'body'] },
        preserveHtmlElements: false,
      },
      theme: {
        extend: {
          colors: {
            'light-blue': colors.lightBlue,
            cyan: colors.cyan,
          },
        },
      },
    }),
    autoprefixer(),
    cssnano(),
  ])
    .process(css, {
      from: undefined,
    })
    .then((result) => {
      compiledCss = result.css
    })

  loopWhile(() => !compiledCss)

  return {
    html,
    css,
    config,
    compiledCss,
  }
}
